linux-kernel - [PATCH 3.2 09/74] PCI: Correct PCI_STD_RESOURCE

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Message-ID: <lsq.1507552234.209086671@decadent.org.uk>
Date:   Mon, 09 Oct 2017 13:30:34 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Bjorn Helgaas" <bhelgaas@...gle.com>
Subject: [PATCH 3.2 09/74] PCI: Correct PCI_STD_RESOURCE_END usage

3.2.94-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Bjorn Helgaas <bhelgaas@...gle.com>

commit 2f686f1d9beee135de6d08caea707ec7bfc916d4 upstream.

PCI_STD_RESOURCE_END is (confusingly) the index of the last valid BAR, not
the *number* of BARs.  To iterate through all possible BARs, we need to
include PCI_STD_RESOURCE_END.

Fixes: 9fe373f9997b ("PCI: Increase IBM ipr SAS Crocodile BARs to at least system page size")
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/pci/quirks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -358,7 +358,7 @@ static void quirk_extend_bar_to_page(str
 {
 	int i;
 
-	for (i = 0; i < PCI_STD_RESOURCE_END; i++) {
+	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
 		struct resource *r = &dev->resource[i];
 
 		if (r->flags & IORESOURCE_MEM && resource_size(r) < PAGE_SIZE) {